CN1236013C - Long-afterglow fluorescent material - Google Patents

Long-afterglow fluorescent material Download PDF

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CN1236013C
CN1236013C CNB021069999A CN02106999A CN1236013C CN 1236013 C CN1236013 C CN 1236013C CN B021069999 A CNB021069999 A CN B021069999A CN 02106999 A CN02106999 A CN 02106999A CN 1236013 C CN1236013 C CN 1236013C
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long
fluorescent material
afterglow fluorescent
phosphorescence
afterglow
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CN1438292A (en
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傅杰
越智康夫
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Ohara Inc
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    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
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    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C03C10/0036—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and a divalent metal oxide as main constituents
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    • C03—GLASS; MINERAL OR SLAG WOOL
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    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • C03C4/12—Compositions for glass with special properties for luminescent glass; for fluorescent glass
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    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
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    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
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Abstract

There is provided a long-lasting phosphor activated by divalent europium and having a chemical composition ROxa(Al1-x Gax)2O3xb(Y1-yScy)2O3xcB2O3xdEu2+xeMn+ (where R is defined as specification) wherein a, b, c, d, e, x and y are within ranges as specification. There is also provided a long-lasting phosphor activated by divalent europium and having a chemical composition ROxa(Al1-x Gax)2O3xb(Si1-yGey)O2xcEu2+xdMn+ (where R is defined as specification) wherein a, b, c, d, x and y are within ranges as specification.

Description

Long-afterglow fluorescent material
The application is that application number is 98109570.4, the applying date is on March 20th, 1998, denomination of invention is divided an application for the application for a patent for invention of " long-afterglow fluorescent material ".
The present invention relates to long-afterglow fluorescent material, more specifically, relate to having and improve the fluorescent brightness and the long-afterglow fluorescent material in life-span.
Fluorescence is the phenomenon of visible emitting when excitaton source that material is applied by the outside excites.Luminescent lamp, discharge tube and cathode ray tube (CRT) emitting fluorescence.The material of emitting fluorescence is referred to as fluorescent substance.When exciting the time durations that continues by the light of fluorescent substance emission after stopping to be enough to be awared by naked eyes, promptly about 0.1 second or when longer, this light is referred to as phosphorescence.The fluorescent material that continues the lasting phosphorescence of length of several hrs in room temperature is referred to as long-afterglow fluorescent material or light-storing fluorescence material.As long-afterglow fluorescent material, prior art has 2 types, i.e. sulfide and the Eu that is represented by ZnS:Cu 2+Activated alkali earth metal aluminate RAl 2O 4(R is an alkaline-earth metal).ZnS:Cu sulfide long-afterglow fluorescent material has used decades, but that their shortcoming is its persistence is short relatively, promptly is about most 3 hours.In addition, the fatal shortcoming of this class fluorescent substance is: contained ultraviolet ray and being contained in the presence of airborne moisture common takes place in daylight Decomposition reaction, make the blackening of fluorescent substance color, result's persistence characteristic in the short period of time degenerates significantly.For this reason, the purposes that this class fluorescent substance is only limited, for example show the night of position in luminous watch and the house.
On the other hand, the Eu that develops recently 2+Activated alkali earth metal aluminate long-afterglow fluorescent material (U.S. Patent number 5376303 and 5424006, Japanese Patent Application Publication special permission 8-73845,8-127772,8-151573 and 8-151574) compare with the ZnS:Cu fluorescent substance and to demonstrate higher phosphorescence brightness, longer life-span and better chemical durability and photostabilization, therefore, estimate that these aluminate fluorescent substances except show also have purposes widely the purposes the existing night that is used for luminous watch and position, house, for example are used to the sign that is against any misfortune, be used to indicate the holding position away from the sign of danger be used for decorating etc.
Though the purposes of long-afterglow fluorescent material has been expanded,, the phosphorescence brightness of the long-afterglow fluorescent material of discovery prior art is still high not enough.Therefore need long-afterglow fluorescent material to have further improved phosphorescence brightness and life characteristic.Also need long-afterglow fluorescent material to have the characteristic that is excited rapidly in the short time.
Therefore, the 1st purpose of the present invention provides a kind of novel long-afterglow fluorescent material that has than higher fluorescent brightness of prior art aluminate fluorescent substance and shorter firing time.
Long-afterglow fluorescent material being used for decorative purpose for example under the situation of dingbat plate, need to use the twilight sunset that comprises many as far as possible colors.Above-mentioned Japanese Patent Application Publication special permission 8-151573 disclose by with aluminate fluorescent substance with have main and auxiliary activator makes up and can give distinct colors.Yet in the disclosure special permission application, this suitable class auxiliary activator that is used to give different colours is limited, and therefore available color also is limited in the narrower scope.
Therefore, the 2nd purpose of the present invention provides a kind of novel long-afterglow fluorescent material, and it is in the color that obtains longer phosphorescence and more emission phosphorescence more can also be provided in the high brightness.
Long-afterglow fluorescent material is being used to make under the situation of ornament, owing to by sintering is extremely difficult its formation for example is lower than the thick pipe of 1mm with the aluminate long afterglow luminophore of prior art, so the long-afterglow fluorescent material that overcomes this problem need be provided.
Therefore, the 3rd purpose of the present invention provides a kind of novel long-afterglow fluorescent material, and it is to be difficult to use the goods of making by the long-afterglow fluorescent material of sintering preparation that this fluorescent substance can be produced its shape.
In order to realize the 1st purpose of the invention described above, the inventor has carried out experimental study and discovery to existing with divalent europium activated aluminate long afterglow fluorescent substance: by yttrium oxide and/or Scium trioxide are introduced these long-afterglow fluorescent materials, can strengthen phosphorescence brightness significantly and keep phosphorescent lifetime simultaneously.
According to having realized the 1st purpose the present invention of the present invention, provide Eu 2+It is ROa (Al that activated has chemical constitution 1-xGa x) 2O 3B (Y 1-ySc y) 2O 3CB 2O 3DEu 2+EM N+Long-afterglow fluorescent material (wherein R is selected from alkaline-earth metal to comprise that Ba, Sr, Ca and Mg and Zn's is at least a, M is at least a auxiliary activator that is selected from Nb, Zr, Bi, Mn, Sn, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu), wherein a, b, c, d, e, x and y are below in the scope:
0.3≤a≤8，
0＜b≤0.2，
0.001≤c≤0.2，
0.001≤d≤0.3，
0.001≤e≤0.3，
0≤x＜1.0 and
0≤y≤1.0。
In one aspect of the invention, this long-afterglow fluorescent material also contains the Li of 0.001-8% mole.
In another aspect of the present invention, near the wavelength place of this long-afterglow fluorescent material 440nm has emission peak and contains CaAl 2O 4And Ca (Rm, Y) Al (Al 2O 7) crystal (wherein Rm is be selected from Eu, Dy, Sc, La, Ce, Pr, Nd, Sm, Gd, Tb, Ho, Er, Tm, Yb and Lu at least a).
In another aspect of the present invention, near the wavelength place of this long-afterglow fluorescent material 440nm has emission peak and contains CaAl 2O 4And Ca (Eu, Nd, Y) Al (Al 2O 7) crystal.
In another aspect of the present invention, near the wavelength place of this long-afterglow fluorescent material 520nm has emission peak and contains SrAl 2O 4(Rm, Y) AlO 3Crystal (wherein Rm is be selected from Eu, Dy, Sc, La, Ce, Pr, Nd, Sm, Gd, Tb, Ho, Er, Tm, Yb and Lu at least a).
In another aspect of the present invention, near the wavelength place of this long-afterglow fluorescent material 520nm has emission peak and contains SrAl 2O 4(Eu, Dy, Y) AlO 3Crystal.
In another aspect of the present invention, near the wavelength place of this long-afterglow fluorescent material 490nm has emission peak and contains Sr 4Al 14O 25And Al 5(Rm, Y) 3O 12Crystal (wherein Rm is be selected from Eu, Dy, Sc, La, Ce, Pr, Nd, Sm, Gd, Tb, Ho, Er, Tm, Yb and Lu at least a).
In another aspect of the present invention, near the wavelength place of this long-afterglow fluorescent material 490nm has emission peak and contains Sr 4Al 14O 25And Al 5(Eu, Dy, Y) 3O 12Crystal.
In order to realize the 2nd purpose of the invention described above, the inventor has carried out experimental study and has found: also optionally make up Al in the existing alkaline earth aluminosilicate by divalent europium is incorporated into as main activator and other auxiliary activator or activator 2O 3+ Ga 2O 3And SiO 2+ GeO 2Ratio of components and divalent europium and auxiliary activator or the concentration of activator in specified range, provide have the various wavelength emission phosphorescence abundanter than prior art aluminate be their the emission phosphorescence have abundanter versicolor long-afterglow fluorescent material, kept sufficiently long steady persistence phosphorescent lifetime and sufficiently high brightness simultaneously.
Invention according to having realized the 2nd purpose of the present invention provides Eu 2+It is ROa (Al that activated has chemical constitution 1-xGa x) 2O 3B (Si 1-yGe y) O 2CEu 2+DM N+Long-afterglow fluorescent material (wherein R is selected from alkaline-earth metal to comprise that Ba, Sr, Ca and Mg and Zn's is at least a, M is selected from least a auxiliary activator of Nb, Zr, Bi, Mn, Sn, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu), wherein a, b, c, d, x and y are below in the scope:
0.3≤a≤8，
0.001≤b≤2，
0.001≤c≤0.3，
0.001≤d≤0.3，
0≤x＜1.0 and
0≤y≤1.0。
Have been found that: by the glass-ceramic method can the 2nd purpose of accomplished the present invention long-afterglow fluorescent material, can easily produce the goods that are difficult to prepare its shape by sintering thus.
Invention according to having realized the 3rd purpose of the present invention provides the glass-ceramic fluorescent substance, and it has and the above-mentioned identical composition of long-afterglow fluorescent material that is used to realize the 2nd purpose of the present invention.
I. having chemical constitution is ROa (Al 1-xGa x) 2O 3B (Y 1-ySc y) 2O 3CB 2O 3DEu 2+EM N+Long-afterglow fluorescent material.
In these long-afterglow fluorescent materials, a represents Al 2O 3+ Ga 2O 3Or Al 2O 3Ratio of components, b represents Y 2O 3And/or Sc 2O 3Ratio of components.By in the scope of 0.3≤a≤8, increasing b, observed the remarkable improvement of phosphorescence brightness up to 0.2.If b is increased to outside the above-mentioned scope, brightness reduces so.In these long-afterglow fluorescent materials, c represents B 2O 3Ratio of components.Have been found that: B in 0.001≤c≤0.2 scope 2O 3Be effective aspect the increase brightness.The concentration factor d that represents main activator should be in the scope of 0.001≤d≤0.3.If d is less than 0.001, exciting light can not be absorbed effectively so, and the result just can not produce the phosphorescence brightness that naked eyes can pick out.On the contrary, if d surpasses 0.3, so so because concentration quenching brightness reduction.The concentration factor e of expression auxiliary activator should be in the scope of 0.001≤e≤0.3.If e less than 0.001, improves a little less than the effect all in phosphorescence brightness and life-span so, if e surpasses 0.3, brightness reduces so.
Coefficient x represents the ratio with the Ga substitute for Al.Can substitute part A l with Ga, and in this case, can also obtain to be better than the long-afterglow fluorescent material of prior art ZnS:Cu fluorescent substance.Can substitute nearly all Al with Ga, but in order to obtain better character, this substitutes should be in the scope of x≤0.5, preferably in the scope of x≤0.2.
Coefficient y represents to substitute with Sc the ratio of Y.Can substitute all Y with Sc, but owing to increase Sc 2O 3So the cost of amount material can increase, therefore, y should be preferably in the scope of y≤0.2.
By Li is joined in the long-afterglow fluorescent material, further increase phosphorescence brightness.If the amount of Li is less than 0.001%, this effect is not remarkable, if the amount of Li surpasses 8%, phosphorescence brightness does not increase reduction on the contrary so.Therefore, the amount of Li should be in the scope of 0.001-8%.In order to obtain good especially effect, the amount of preferred Li is in the scope of 0.005-5%.
For improving phosphorescence brightness, Y 2O 3Component is absolutely necessary.Verified from the X-ray diffraction analysis: in above-mentioned compositing range, with CaAl 2O 4And Ca (Rm, Y) Al (Al 2O 7) crystal (wherein Rm is be selected from Eu, Dy, Sc, La, Ce, Pr, Nd, Sm, Gd, Tb, Ho, Er, Tm, Yb and Lu at least a) is prepared into the long-afterglow fluorescent material that near 440nm wavelength place has emission peak, with SrAl 2O 4(Rm, Y) AlO 3Crystal (wherein Rm is be selected from Eu, Dy, Sc, La, Ce, Pr, Nd, Sm, Gd, Tb, Ho, Er, Tm, Yb and Lu at least a) is prepared into that near 520nm wavelength place has the long-afterglow fluorescent material of emission peak and with Sr 4Al 14O 25And Al 5(Rm, Y) 3O 12Crystal (wherein Rm is be selected from Eu, Sc, La, Ce, Pr, Nd, Sm, Gd, Tb, Ho, Er, Tm, Yb and Lu at least a) is prepared into the long-afterglow fluorescent material that near 490nm wavelength place has emission peak.
Suppose from these results: the Y that part adds 2O 3Be incorporated in the aluminate crystal but the remainder of this component be incorporated into the 2nd mutually in.Under the former situation, think that yttrium helps lend some impetus to formation carrier ravin (traps) or the stable carrier ravin that directly helps to strengthen phosphorescence brightness, and under latter instance, think that the 2nd communicates and overregulate aluminate crystal and work to stablize this carrier ravin.Owing to these reasons, become apparent as embodiment as described in following, by adding Y 2O 3Component has improved phosphorescence brightness significantly, in addition, firing time shortened half or more than.Comprising CaAl 2O 4And Ca (Eu, Nd, Y) Al (Al 2O 7) crystalline have in wavelength 440nm vicinity emission peak long-afterglow fluorescent material, comprise SrAl 2O 4(Eu, Dy, Y) AlO 3Crystalline has the long-afterglow fluorescent material of emission peak and comprises Sr in wavelength 520nm vicinity 4Al 14O 25, SrAl 2O 4And Al 5(Eu, Dy, Y) 3O 12Crystalline has obtained good especially steady persistence phosphorescence (brightness and life-span) characteristic in wavelength 490nm vicinity has the long-afterglow fluorescent material of emission peak.In producing long-afterglow fluorescent material process of the present invention, can be with such as NH 4H 2PO 4Phosphorus compound, such as NH 4F, NH 4The halogen compounds of Cl and NH 4B adds as fusing assistant.Its optimal addn is in the scope of 0.05-8% (mole).
The long-afterglow fluorescent material that can prepare above-mentioned chemical constitution by sintering.As the raw material of long-afterglow fluorescent material of the present invention, can use material beneath:
(1), can use oxide compound, carbonate, nitrate, halogenide etc. as the RO component.
(2) as Al 2O 3Component can use oxide compound, nitrate, oxyhydroxide, halogenide etc.
(3) as Y 2O 3Component can use oxide compound, nitrate, halogenide etc.
(4), can use oxide compound, carbonate, nitrate, halogenide etc. as the Rm component.
(5), can use Li as the Li component 2CO 3, LiNO 3, Li 2SO 4, Li 3BO 3, Li 3SiO 3, Li 3PO 4, Li 3WO 3, Li 3MoO 3, halogenide etc.
These materials are weighed and thorough mixing with predetermined ratio.This blended material put into the aluminium crucible and at reducing atmosphere at about 1100-1600 ℃ the about 1-10 of scope sintering hour.In some cases, according to the composition of fluorescent substance, can pulverize the agglomerating material and under identical sintering condition, carry out sintering again.
II. having chemical constitution is ROa (Al 1-xGa x) 2O 3B (Si 1-yGe y) O 2CEu 2+DM N+Long-afterglow fluorescent material
Past has been developed various comprising by Bivalence europium enabled alkaline earth metal silico-aluminate fluorescent substance.For example, Japanese patent application publication No. 47-41 discloses by ROaAl 2O 32SiO 2: the fluorescent substance that Eu (wherein R is an alkaline-earth metal) forms, Japanese patent application publication No. 7-45656 discloses by (Ba wCa xMg yEu z) OaAl 2O 3BSiO 2The fluorescent substance of forming.These fluorescent substances demonstrate and the different characteristics of luminescence of not siliceous fluorescent substance.Think this difference be since in the matrix difference in ligand field cause.Because Eu 2+Emission is because 4f 7-4f 6The 5d transition is so be subjected to Eu 2+Chemical environment is on every side promptly accepted Eu 2+The intensity effect in the ligand field of matrix is very big.The alkaline earth aluminosilicate fluorescent substance of these prior aries has enough required luminosity for practicality, but owing to they are all developed for luminescent lamp and cathode tube, so they only have very short time of persistence.For example, the fluorescent substance ROAl in being disclosed in above-mentioned Japanese patent application publication No. 47-41 2O 32SiO 2: under the situation of Eu, time of persistence is very short, and its time constant is less than 1 microsecond.In other words, though these fluorescent substances are luminous during with optical excitation, stop after the radiation this and luminously disappear soon and do not have the steady persistence phosphorescent characteristics basically.
The electron density that is known that oxonium ion is high more, and promptly the alkalescence of matrix is high more, and the ligand field is strong more so.This can cause Eu 2+The bigger division of 5d energy level, so the lowest energy level of 5d is low more.Owing to this reason, along with the increase of matrix alkalescence, because Eu 2+The emission key of 5d-4f transition will move to the long wave direction.Therefore, if in the alkaline earth aluminosilicate fluorescent substance of prior art, obtain the steady persistence phosphorescent characteristics, so owing to have the Al of the alkalescence of differing from one another by adjusting by being added in the effective auxiliary activator in prolongation phosphorescent lifetime aspect 2O 3+ Ga 2O 3With SiO 2+ GeO 2Ratio, the intensity in matrix ligand field can change in wide range, expectation can provide the long-afterglow fluorescent material that more is rich in various emission phosphorescence colors than prior art aluminate long afterglow fluorescent substance.
In addition, by with the material fusion with its vitrifying and this glass is carried out appropriate heat treatment can make alkaline earth aluminosilicate form glass-ceramic.The alkaline earth aluminosilicate formation of the invention described above can be had chemical constitution is ROa (Al 1-xGa x) 2O 3B (Si 1-yGe y) O 2CEu 2+DM N+The glass-ceramic fluorescent substance of (wherein R is selected from alkaline-earth metal and comprises at least a of Ba, Sr, Ca and Mg and Zn, and M is at least a auxiliary activator that is selected from Nb, Zr, Bi, Mn, Sn, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu).With such glass-ceramic long-afterglow fluorescent material, can easily make with prior art pottery long-afterglow fluorescent material and be lower than the goods of 1mm light wall pipe such as wall thickness by what sintering was difficult to produce.
In these long-afterglow fluorescent materials of the present invention, a represents Al 2O 3Or Al 2O 3+ Ga 2O 3Ratio of components, b represents SiO 2And/or GeO 2Ratio of components.Coefficient a and b restrict each other, change the intensity in the ligand field of matrix by the value of regulating these coefficients, and the result also changes radiative wavelength, phosphorescence brightness and life-span.If the less b of a is bigger, or the big b of a is less, and phosphorescence intensity increases.Yet, the system of being limited in scope of a and b.If b is less than 0.001 in the scope of 0.3≤a≤8, the effect of Si and/or Ge is weak so, if b surpasses 2, can not produce the long-afterglow fluorescent material with high phosphorescence brightness so.Equally, if b a in the scope of 0.001≤b≤2 can not produce the long-afterglow fluorescent material with high phosphorescence brightness so outside the scope of 0.3≤a≤8.Coefficient a and b preferably should be in the scopes of 0.3≤a≤6 and 0.001≤b≤2, more preferably in the scope of 0.5≤a≤3 and 0.002≤b≤2.
The coefficient c that represents main activator concentration should be in the scope of 0.001≤c≤0.3.If c is less than 0.001, exciting light can not be absorbed effectively so, and the result just can not produce the steady persistence phosphorescence brightness that naked eyes can pick out.On the contrary, if c surpasses 0.3, so so because the reduction of concentration quenching phosphorescence brightness.C preferably should be in the scope of 0.001≤c≤0.2, and c is more preferably in the scope of 0.002≤c≤0.1.The coefficient d of the concentration of expression auxiliary activator should be in the scope of 0.001≤d≤0.3.If d less than 0.001, improves a little less than the effect all in steady persistence phosphorescence brightness and life-span so, if d surpasses 0.3, phosphorescence brightness reduces so.Coefficient d preferably should be in the scope of 0.001≤d≤0.2, more preferably should be in the scope of 0.002≤d≤0.15.
Coefficient x represents the ratio with the Ga substitute for Al.Can substitute part A l with Ga, and in this case, can also obtain to be better than the long-afterglow fluorescent material of prior art ZnS:Cu fluorescent substance.Can substitute nearly all Al with Ga, but in order to obtain better character, this substitutes should be in the scope of x≤0.5, preferably in the scope of x≤0.2.
Coefficient y represents to substitute with Ge the ratio of Si.Even, still can produce at the long-afterglow fluorescent material that is better than prior art ZnS:Cu fluorescent substance aspect phosphorescence intensity and its life-span substituting under the situation of part Si with Ge.Can substitute all Si with Ge, but in order to obtain better character, this substitutes should be in the scope of y≤0.5, preferably in the scope of y≤0.2.
In producing long-afterglow fluorescent material process of the present invention, can be with boric acid, Li 2CO 3, LiCl or phosphorus compound or other compound add as fusing assistant.The optimal addn of fusing assistant is in the scope of 0.05-8% (mole) like this.
Can be by the long-afterglow fluorescent material of the above-mentioned chemical constitution of SINTERING PRODUCTION.More specifically, will constitute the oxide compound of this long-afterglow fluorescent material or such as changing into the carbonate of oxide compound or the compound of nitrate is weighed and thorough mixing with predetermined ratio by thermolysis.Put into this blended material in the aluminium crucible and in reducing atmosphere at 1100-1600 ℃ the about 1-10 of temperature range sintering hour.In some cases,, can pulverize the fluorescent substance that obtains, and under identical condition, carry out sintering again according to the composition of fluorescent substance.
These long-afterglow fluorescent materials of the present invention also can be produced by the glass-ceramic method in the following method:
Raw material is weighed and thorough mixing with predetermined ratio.Then, put into this blended material in the aluminium crucible and in reducing atmosphere at 1300-1600 ℃ the about 1-3 of temperature range fusion hour.Thereby this melts is cast in iron plate going up form foliated glass.With this glass in reducing atmosphere at the about 1-12 of the further heat treated of 950-1250 ℃ temperature range hour, produce thus and comprise that chemical constitution is ROa (Al 1-xGa x) 2O 3B (Si 1-yGe y) 2O 3CEu 2+DM N+The crystalline glass-ceramic long-afterglow fluorescent material of (wherein R is selected from alkaline-earth metal and comprises at least a of Ba, Sr, Ca and Mg and Zn, and M is at least a auxiliary activator that is selected from Nb, Zr, Bi, Mn, Sn, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu).With such glass-ceramic method, can easily form the goods that are difficult to produce with ceramic long-afterglow fluorescent material such as light wall pipe.In addition, preparing in the ceramic process by sintering, exist micropore, this micropore so seriously reduces intensity sometimes to be caused and can not satisfy needed intensity., glass-ceramic long-afterglow fluorescent material prepared in accordance with the present invention does not have such micropore, therefore, can produce the long-afterglow fluorescent material of strength ratio pottery fluorescent substance excellence and therefore can widen the purposes of such long-afterglow fluorescent material.
The summary of accompanying drawing
In the accompanying drawings,
Fig. 1 is explanation embodiment 4 and the emmission spectrum figure of Comparative examples A after stopping to excite 10 minutes.
Fig. 2 is that explanation stops to excite the variation diagram of back phosphorescence brightness as the firing time function.
Fig. 3 is explanation embodiment 21 and the emmission spectrum figure of comparative example B after stopping to excite 1 minute.
Fig. 4 is explanation embodiment 26 and the emmission spectrum figure of comparative example C after stopping to excite 1 minute.
Fig. 5 is the SEM photo of comparative example C.
Fig. 6 is the SEM photo of embodiment 25.
Fig. 7 is the SEM photo of embodiment 27.
Fig. 8 has illustrated the x-ray diffraction pattern of embodiment 29.
Fig. 9 is the emmission spectrum figure of explanation embodiment 29 after stopping to excite 10 minutes.
Figure 10 has illustrated the x-ray diffraction pattern of embodiment 30.
Figure 11 is the emmission spectrum figure of explanation embodiment 30 after stopping to excite 10 minutes.
Figure 12 is explanation embodiment 34 and the emmission spectrum figure of its comparative example after stopping to excite 10 minutes.
Figure 13 is the emmission spectrum figure of explanation embodiment 45 after stopping to excite 10 minutes.
Figure 14 is the emmission spectrum figure of explanation embodiment 46 after stopping to excite 10 minutes.
Figure 15 is explanation detects the excitation spectrum of emission wavelength at the 515nm place figure; With
Figure 16 is the emmission spectrum figure of explanation embodiment 48 after stopping to excite 10 minutes.
Embodiment
Narrate embodiments of the invention below.It is to be noted that the present invention is not subjected to the restriction of these embodiment.
I. having chemical constitution is ROa (Al 1-xGa x) 2O 3B (Y 1-ySc y) 2O 3CB 2O 3DEu 2+EM N+The embodiment of long-afterglow fluorescent material.
Embodiment 1
CaCO 3 7.22g
Al 2O 3 7.37g
Y 2O 3 0.03g
H 3BO 3 0.18g
Eu 2O 3 0.10g
Nd 2O 3 0.10g
With the material thorough mixing of above-mentioned composition and at 97N 2+ 3H 2Mixed airflow in produce thus 1350 ℃ of sintering 2 hours that to have chemical constitution be CaOAl 2O 30.002Y 2O 30.02B 2O 30.004Eu 2O 30.004Nd 2O 3Long-afterglow fluorescent material.This long-afterglow fluorescent material demonstrates emission peak at about 440nm place.Observe with the naked eye blue phosphorescent and spend 24 hours in the dark and still can pick out phosphorescence.
Embodiment 2-10
By using and being used to prepare the identical method of embodiment 1 fluorescent substance and preparing and have the embodiment 2-10 of same color phosphorescence and the long-afterglow fluorescent material of Comparative examples A.Its composition is listed in the table 1.Find from the X-ray diffraction analysis: the long-afterglow fluorescent material of these embodiment comprises CaAl 2O 4And Ca (Eu, Nd, Y) Al (Al 2O 7) crystal.Reining in these embodiment and comparative example are measured in radiation under the illuminating value with luminance meter after 4 minutes phosphorescence brightness with D65 light source (FL20S.D-EDL-D65 that makes by Toshiba Litec K.K.) 200.Below table 1 relative brightness with respect to the phosphorescence brightness that is expressed as 100 Comparative examples A has been described when the composition of each fluorescent substance and its stop to excite back 10 minutes.In the form of table 1 and back, " comparing embodiment " is abbreviated as " comparative example ".Fig. 1 has illustrated embodiment 4 and the emmission spectrum figure of Comparative examples A when stopping to excite back 10 minutes.Can obviously find out from table 1 and Fig. 1: with Y 2O 3Join in the blue phosphorescent fluorescent substance of prior art and cause strengthening significantly phosphorescence brightness or luminous intensity.In addition, still can pick out the phosphorescence of launching by embodiment 2-10 after 24 hours excessively in the dark.
Phosphorescence brightness was as the variation diagram of firing time function after Fig. 2 had illustrated and stopped exciting promptly in embodiment 4 and Comparative examples A.Using above-mentioned light source and used illuminating value is 200 to rein in.As can be seen, the brightness that reaches capacity of the long-afterglow fluorescent material of prior art has been used about 45 minutes, and brightness has only been used about 20 minutes and long-afterglow fluorescent material of the present invention reaches capacity.About 80% for the brightness that reaches capacity, the brightness that reaches capacity of the long-afterglow fluorescent material of prior art has been used about 25 minutes, brightness has only been used about 10 minutes and long-afterglow fluorescent material of the present invention reaches capacity.Can find out significantly from these results: comprise Y 2O 3Long-afterglow fluorescent material of the present invention not only have higher phosphorescence brightness, and also have and reduce half or short firing time over half by inhale absorbing exciting light effectively.
Table 1
Embodiment number Form Relative intensity
1 CaO·Al 2O 3·0.002 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3· 0.004 Nd 2O 3 120
2 CaO·Al 2O 3·0.004 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3· 0.004 Nd 2O 3 160
3 CaO·Al 2O 3·0.006 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3· 0.004 Nd 2O 220
4 CaO·Al 2O 3·0.01 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3· 0.004 Nd 2O 3 240
5 CaO·Al 2O 3·0.02 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3· 0.004 Nd 2O 3 220
6 CaO·Al 2O 3·0.04 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3· 0.004 Nd 2O 3 180
7 CaO·Al 2O 3·0.08 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3· 0.004 Nd 2O 3 160
8 CaO·0.98 Al 2O 3·0.02 Ga 2O 3·0.01 Y 2O 3·0.02 B 2O 3 ·0.004 Eu 2O 3·0.004 Nd 2O 3 210
9 CaO·0.96 Al 2O 3·0.04 Ga 2O 3·0.01 Y 2O 3·0.02 B 2O 3 ·0.004 Eu 2O 3·0.004 Nd 2O 3 190
10 CaO·0.92 Al 2O 3·0.08 Ga 2O 3·0.01 Y 2O 3·0.02 B 2O 3 ·0.004 Eu 2O 3·0.004 Nd 2O 3 150
Comparative examples A CaO·Al 2O 3·0.02 B 2O 3·0.004 Eu 2O 3·0.004 Nd 2O 3 100
Embodiment 11-17
By use the method preparation identical with the long-afterglow fluorescent material that is used to prepare embodiment 1 wherein except auxiliary activator Nd also respectively with Pr, Sm, Gd, Ho, Er, Tm or Lu as the embodiment 11-17 of auxiliary activator adding and the long-afterglow fluorescent material of comparative example 11-17 accordingly, and the relative brightness when measuring these fluorescent substances and stopping to excite back 10 minutes.Below table 2 composition of each embodiment and comparative example and the result of relative phosphorescence brightness have been described.Found that from these: long-afterglow fluorescent material of the present invention demonstrates the phosphorescence brightness higher than prior art long-afterglow fluorescent material.Still observe phosphorescence in the dark after 24 hours by embodiment 11-17 emission.
Table 2
Embodiment number Form Relative intensity
11 CaO·Al 2O 3·0.005 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3· 0.002 Nd 2O 3·0.0006 Pr 5O 11 150
Comparative example 11 CaO·Al 2O 3·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3· 0.0006 Pr 6O 11 100
12 CaO·Al 2O 3·0.01 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3· 0.002 Nd 2O 3·0.002 Sm 2O 3 160
Comparative example 12 CaO·Al 2O 3·0.02 B 2O 3·0.004 Eu 2O 3·0.00 2 Nd 2O 3· 0.002 Sm 2O 3 100
13 CaO·Al 2O 3·0.01 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3· 0.002 Nd 2O 3·0.00 2 Gd 2O 3 170
Comparative example 13 Cau·Al 2O 3·0.0 2 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3· 0.002 Gd 2O 3 100
14 CaO·Al 2O 3·0.01 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3 0.002 Nd 2O 3·0.002 Ho 2O 3 120
Comparative example 14 CaO·Al 2O 3·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3· 0.002 Ho 2O 3 100
15 CaO·Al 2O 3·0.01 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3· 0.002 Nd 2O 3·0.002 Er 2O 3 150
Comparative example 15 CaO·Al 2O 3·0.02 B 2O 3·0.004 E 2O 3·0.002 Nd 2O 3· 0.002 Er 2O 3 100
16 CaO·Al 2O 3·0.01 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3· 0.002 Nd 2O 3·0.002 Tm 2O 3 270
Comparative example 16 CaO·Al 2O 3·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3· 0.002 Tm 2O 3. 100
17 CaO·Al 2O 3·0.01 Y 2O 3·0.02 B 2O 3·0.004 Eu 2O 3· 0.002 Nd 2O 3·0.002 Lu 2O 3 115
Comparative example 17 CaO·Al 2O 3·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3· 0.002 Lu 2O 3 100
Embodiment 18
SrCO 3 8.64g
Al 2O 3 5.97g
Y 2O 3 0.03g
H 3BO 3 0.14g
Eu 2O 3 30.10g
Dy 2O 3 0.11g
With the material thorough mixing of above-mentioned composition and at 97N 2+ 3H 2Mixed airflow in 1350 ℃ of sintering 2 hours, produce thus that to have chemical constitution be SrOAl 2O 30.002Y 2O 30.02B 2O 30.005Eu 2O 30.005Dy 2O 3Long-afterglow fluorescent material.This fluorescent substance demonstrates emission peak at about 520nm place.Observe with the naked eye pistac phosphorescence, and still can pick out phosphorescence in 24 hours excessively in the dark.
Embodiment 19-23
By using and being used to prepare the identical method of embodiment 18 fluorescent substances and preparing and have the embodiment 19-23 of same color phosphorescence and the long-afterglow fluorescent material of comparative example B.Below table 3 relative brightness when the composition of these embodiment and comparative example and its stop to excite back 1 minute has been described.Find from the X-ray diffraction analysis: resulting long-afterglow fluorescent material contains SrAl 2O 4(Eu, Dy, Y) AlO 3Crystal.Fig. 3 has illustrated embodiment 21 and the emmission spectrum figure of comparative example B when stopping to excite back 1 minute.From table 3 and Fig. 3 as can be seen: comprise Y 2O 3Fluorescent substance of the present invention demonstrate higher phosphorescence brightness and stronger emission.Can also find out significantly from table 3: further improved phosphorescence brightness by adding Li.Cross the phosphorescence that still can be observed embodiment 19-23 fluorescent substance after 24 hours in the dark.
Table 3
Embodiment number Form Relative intensity
18 SrO·Al 2O 3·0.002 Y 2O 3·0.02 B 2O 3·0.005 Eu 2O 3· 0.005 Dy 2O 3 110
19 SrO·Al 2O 3·0.006 Y 2O 3·0.02 B 2O 3·0.005 Eu 2O 3· 0.005 Dy 2O 3 105
20 SrO·Al 2O 3·0.004 Y 2O 3·0.02 B 2O 3·0.004 Li 2O· 0.005 Eu 2O 3·0.005 Dy 2O 3 115
21 SrO·Al 2O 3·0.008 Y 2O 3·0.02 B 2O 3·0.004 Li 2O· 0.005Eu 2O 3·0.006Dy 2O 3 120
22 SrO·Al 2O 3·0.020 Sc 2O 3·0.02 B 2O 3·0.005 Eu 2O 3· 0.005 Dy 2O 3 130
23 SrO·Al 2O 3·0.032 Sc 2O 3·0.02 B 2O 3·0.005 Eu 2O 3· 0.005 DY 2O 3 122
Comparative example B SrO·Al 2O 3·0.02 B 2O 3·0.005 Eu 2O 3·0.005 Dy 2O 3 100
Embodiment 24
SrCO 3 6.58g
Al 2O 3 7.95g
Y 2O 3 0.03g
H 3BO 3 0.30g
Eu 2O 3 0.07g
Dy 2O 3 0.07g
With the material thorough mixing of above-mentioned composition and at 97N 2+ 3H 2Mixed airflow in produce thus 1450 ℃ of sintering 2 hours that to have chemical constitution be SrO1.75Al 2O 30.003Y 2O 30.06B 2O 30.004Eu 2O 30.004Dy 2O 3Long-afterglow fluorescent material.This fluorescent substance demonstrates emission peak at about 490nm place.Observe with the naked eye pale bluish green phosphorescence, and still can pick out phosphorescence in 24 hours excessively in the dark.
Embodiment 25-28
By using and being used to prepare the identical method of embodiment 24 fluorescent substances and preparing and have the embodiment 25-28 of same color phosphorescence and the long-afterglow fluorescent material of comparative example C.Below table 4 relative brightness when the composition of these embodiment and comparative example and its stop to excite back 1 minute has been described.Find from the X-ray diffraction analysis: the long-afterglow fluorescent material that obtains comprises Sr 4Al1 4O 25, SrAl 2O 4And Al 5(Eu, Dy, Y) 3O 12Crystal.Fig. 4 has illustrated embodiment 26 and the emmission spectrum figure of comparative example C when stopping to excite back 1 minute.From table 4 and Fig. 4 as can be seen: wherein add Y 2O 3Fluorescent substance of the present invention demonstrate than higher phosphorescence brightness of prior art fluorescent substance and stronger emissive porwer.Cross the phosphorescence that still can be observed embodiment 25-28 fluorescent substance after 24 hours in the dark.
The SEM photo of comparative example C, embodiment 25 and embodiment 27 is shown in respectively among Fig. 5,6 and 7.Obviously, fluorescent substance of the present invention has the particle diameter more much bigger than prior art fluorescent substance.
Table 4
Embodiment number Form Relative intensity
24 SrO·1.75 Al 2O 3·0.003 Y 2O 3·0.06 B 2O 3· 0.004 Eu 2O 3·0.004 Dy 2O 3 110
25 SrO·1.75 Al 2O 3·0.007 Y 2O 3·0.06 B 2O 3· 0.004 Eu 2O 3·0.004 Dy 2O 3 130
26 SrO·1.75 Al 2O 3·0.011 Y 2O 3·0.06 B 2O 3· 0.004 Eu 2O 3·0.004 Dy 2O 3 158
27 SrO·1.75 Al 2O 3·0.014 Y 2O 3·0.06 B 2O 3· 0.004 Eu 2O 3·0.004 Dy 2O 3 160
28 SrO·1.75 Al 2O 3·0.022 Y 2O 3·0.06 B 2O 3· 0.004 Eu 2O 3·0.004 Dy 2O 3 140
Comparative example C SrO·1.75 Al 2O 3·0.06 B 2O 3·0.004 Eu 2O 3· 0.004 Dy 2O 3 100
Fast light test
Long-afterglow fluorescent material usually uses with the state that is exposed in the sunlight, therefore, needs long-afterglow fluorescent material to sunlight, particularly the UV-light that is contained is therein had high photostabilization.According to the light fastness test method that can be used for luminous paint (JIS standard), use the mercury-arc lamp of 300W that long-afterglow fluorescent material prepared in accordance with the present invention is carried out fast light test.As a result, in the sample of any test, all do not observe the reduction of phosphorescence brightness.
II. having chemical constitution is ROa (Al 1-xGa x) O 2B (Si 1-yGe y) O 2CEu 2+DM N+The embodiment of long-afterglow fluorescent material
Embodiment 29
SrCO 3 5.69g
Al 2O 3 3.93g
SiO 2 4.63g
H 3BO 3 0.19g
Eu 2O 3 0.27g
Dy 2O 3 0.29g
With the material thorough mixing of above-mentioned composition and at 97N 2+ 3H 2Mixed airflow in 1350 ℃ of sintering 2 hours, produce thus that to have chemical constitution be SrOAl 2O 32.00SiO 20.04B 2O 30.020Eu 2O 30.020Dy 2O 3Long-afterglow fluorescent material.X-ray diffraction map analysis from be shown in Fig. 8 is found: this long-afterglow fluorescent material is by SrAl 2Si 2O 8Phase composite.Fig. 9 has illustrated the emmission spectrum figure when stopping to excite back 10 minutes.This long-afterglow fluorescent material has emission peak at about 420nm and 485nm place.In the prior art long-afterglow fluorescent material, do not observe such emission characteristic.Observe with the naked eye white phosphorescence, and still can pick out phosphorescence in 24 hours excessively in the dark.
Embodiment 30
CaCO 3 4.42g
Al(OH) 3 6.90g
SiO 2 5.30g
H 3BO 3 0.22g
Eu 2O 3 0.19g
Nd 2O 3 0.36g
With the material thorough mixing of above-mentioned composition and at 97N 2+ 3H 2Mixed airflow in produce thus 1350 ℃ of sintering 2 hours that to have chemical constitution be CaOAl 2O 32.00SiO 20.04B 2O 30.012Eu 2O 30.024Nd 2O 3Long-afterglow fluorescent material.X-ray diffraction map analysis from be shown in Figure 10 is found: this long-afterglow fluorescent material is by CaAl 2Si 2O 8Phase composite.Figure 11 has illustrated the emmission spectrum figure when stopping to excite back 10 minutes.This long-afterglow fluorescent material has emission peak at about 425nm and 540nm place.This emission characteristic is different with the prior art fluorescent substance.Observe with the naked eye light blue purple phosphorescence, and still can pick out phosphorescence in 24 hours excessively in the dark.
Embodiment 31
CaCO 3 4.39g
Al 2O 3 4.27g
Ga 2O 3 0.20g
SiO 2 4.45g
NH 4H 2PO 4 1.76g
Eu 2O 3 0.18g
Nd 2O 3 0.34g
With the material thorough mixing of above-mentioned composition and at 97N 2+ 3H 2Mixed airflow in produce thus 1350 ℃ of sintering 2 hours that to have chemical constitution be CaO0.95Al 2O 31.69SiO 20.02Ga 2O 30.17P 2O 50.012Eu 2O 30.023Nd 2O 3Long-afterglow fluorescent material.This long-afterglow fluorescent material is by the CaAl2Si2O8 phase composite.This fluorescent substance has provided similar emission characteristic as shown in Figure 11.Observe with the naked eye light blue purple phosphorescence, and still can pick out phosphorescence in 24 hours excessively in the dark.
Embodiment 32
CaCO 3 7.11g
Al 2O 3 7.25g
SiO 2 0.02g
H 3BO 3 0.18g
Eu 2O 3 0.15g
Nd 2O 3 0.29g
With the material thorough mixing of above-mentioned composition and at 97N 2+ 3H 2Mixed airflow in 1350 ℃ of sintering 2 hours, produce thus that to have chemical constitution be CaOAl 2O 30.005SiO 20.02B 2O 30.006Eu 2O 30.012Nd 2O 3Long-afterglow fluorescent material.This long-afterglow fluorescent material has emission peak at about 440nm place.Observe with the naked eye light blue purple phosphorescence, and still can pick out phosphorescence in 24 hours excessively in the dark.
By using the method identical to prepare embodiment 33-38 and do not comprise SiO with being used to prepare embodiment 32 2The long-afterglow fluorescent material of comparative example.Table 5 has illustrated the chemical constitution of embodiment 32-38.Figure 12 has illustrated the emission spectrogram when embodiment 34 and comparative example stop to excite back 10 minutes.From this figure as can be known: long-afterglow fluorescent material of the present invention has the emissive porwer stronger than comparative example.Cross the phosphorescence that still can be observed these long-afterglow fluorescent materials after 24 hours in the dark.
Table 5
Embodiment number Form
32 CaO·Al 2O 3·0.005 SiO 2·0.02 B 2O 3·0.006 Eu 2O 3·0.012 Nd 2O 3
33 CaO·Al 2O 3·0.009 SiO 2·0.02 B 2O 3·0.006 Eu 2O 3·0.012 Nd 2O 3
34 CaO·Al 2O 3·0.014 SiO 2·0.02 B 2O 3·0.006 Eu 2O 3·0.012 Nd 2O 3
35 CaO·Al 2O 3·0.028 SiO 2·0.02 B 2O 3·0.006 Eu 2O 3·0.012 Nd 2O 3
36 CaO·Al 2O 3·0.036 SiO 2·0.02 B 2O 3·0.006 Eu 2O 3·0.012 Nd 2O 3
37 CaO·Al 2O 3·0.040 SiO 2·0.02 B 2O 3·0.006 Eu 2O 3·0.012 Nd 2O 3
38 CaO·Al 2O 3·0.048 SiO 2·0.02 B 2O 3·0.006 Eu 2O 3·0.012 Nd 2O 3
Comparative example CaO·Al 2O 3·0.02 B 2O 3·0.006 EuO 3·0.012 Nd 2O 3
By use the method preparation identical with being used to prepare embodiment 32 wherein except auxiliary activator Nd also with Ce, Pr, Gd, Er, Tm or Lu as the embodiment 39-44 of auxiliary activator adding and the long-afterglow fluorescent material of corresponding comparative example.Table 6 has illustrated the composition of these embodiment and comparative example.
Table 6
Embodiment number Form
39 CaO·Al 2O 3·0.012 SiO 2·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3· 0.002 CeO 2
Comparative example 39 CaO·Al 2O 3·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3·0.002 CeO 2
40 CaO·Al 2O 3·0.008 SiO 2·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3· 0.0006 Pr 6O 11
Comparative example 40 CaO·Al 2O 3·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3·0.0006 Pr 6O 11
41 CaO·Al 2O 3·0.012 SiO 2·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3· 0.002 Gd 2O 3
Comparative example 41 CaO·Al 2O 3·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3·0.002 Gd 2O 3
42 CaO·Al 2O 3·0.012 SiO 2·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3· 0.002 Er 2O 3
Comparative example 42 CaO·Al 2O 3·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3·0.002 Er 2O 3
43 CaO·Al 2O 3·0.012 SiO 2·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3· 0.002 Tm 2O 3
Comparative example 43 CaO·Al 2O 3·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3·0.002 Tm 2O 3
44 CaO·Al 2O 3·0.012 SiO 2·0.02 B 2O 3·0.004 Eu 2O 3·0.002 Nd 2O 3· 0.002 Lu 2O 3
Comparative example 44 CaO·Al 2O 3·0.02 B 2O 3·0.004 EuO 3·0.002 Nd 2O 3·0.002 Lu 2O 3
Embodiment 45
SrCO 3 14.39g
Al 2O 3 14.95g
SiO 2 0.02g
GeO 2 0.02g
Li 2CO 3 0.02g
H 3BO 3 0.30g
Eu 2O 3 0.12g
Dy 2O 3 0.14g
With the material thorough mixing of above-mentioned composition and at 97N 2+ 3H 3Mixed airflow in 1400 ℃ of sintering 2 hours, produce thus that to have chemical constitution be SrO1.50Al 2O 30.003SiO 20.002GeO 20.003Li 2O0.025B 2O 30.004Eu 2O 30.004Dy 2O 3Long-afterglow fluorescent material.Figure 13 has illustrated the emmission spectrum figure when stopping to excite back 10 minutes.This long-afterglow fluorescent material demonstrates the emission characteristic with peak value at about 490nm place.Observe with the naked eye pale bluish green phosphorescence, and still can pick out phosphorescence in 24 hours excessively in the dark.
Embodiment 46
SrCO 3 8.39g
Al 2O 3 5.80g
GeO 2 0.24g
H 3BO 3 0.14g
Eu 2O 3 0.20g
Dy 2O 3 0.22g
With the material thorough mixing of above-mentioned composition and at 97N 2+ 3H 2Mixed airflow in produce thus 1350 ℃ of sintering 2 hours that to have chemical constitution be SrOAl 2O 30.04GeO 20.020B 2O 30.010Eu 2O 30.010Dy 2O 3Long-afterglow fluorescent material.Figure 14 is illustrated in the emmission spectrum figure when stopping to excite back 10 minutes.This long-afterglow fluorescent material demonstrates the emission characteristic with peak value at about 515nm place.Observe with the naked eye oyster phosphorescence, and still can pick out phosphorescence in 24 hours excessively in the dark.
Figure 15 has illustrated the exciting light spectrogram that is used for emission wavelength 515nm.Can observe the wide excitation band that has 2 peak values at 370nm and 405nm place.Appearance at 405nm place excitation band shows that fluorescent substance of the present invention is more responsive to visible light.
Embodiment 47
MgO 1.86g
CaCO 3 1.92g
Sr(NO 3) 2 12.99g
Al(OH) 3 8.99g
SiO 2 11.52g
Eu 2O 3 0.81g
Dy 2O 3 0.22g
Si (reductive agent) 0.22g
With the material thorough mixing of above-mentioned composition and 1500 ℃ of fusions 3 hours, and cast on the iron plate, produce thus that to have chemical constitution be 0.36MgO0.15CaO0.49SrO0.45Al 2O 31.58SiO 20.018Eu 2O 30.030Dy 2O 3Glass.This glass is at 97N 2+ 3H 2Mixed airflow in produce thus through heat-treated 5 hours at 1150 ℃ and to comprise SrAl 2Si 2O 8Crystalline glass-ceramic long-afterglow fluorescent material.This long-afterglow fluorescent material has similar emission characteristic as shown in FIG. 9.Observe with the naked eye white phosphorescence, and still can pick out phosphorescence in 24 hours excessively in the dark.
Embodiment 48
MgO 1.17g
CaCO 3 10.20g
Al(OH) 3 6.82g
SiO 2 11.36g
Eu 2O 3 1.28g
Nd 2O 3 1.23g
Si (reductive agent) 0.31g
With the material thorough mixing of above-mentioned composition and 1500 ℃ of fusions 3 hours, and cast on the iron plate, produce thus that to have chemical constitution be 0.22MgO0.78CaO0.33Al 2O 31.53SiO 20.028Eu 2O 30.028Nd 2O 3Glass.This glass is at 97N 2+ 3H 2Mixed airflow in 1100 ℃ through heat-treated 5 hours, produce thus and comprise CaAl 2Si 2O 8Crystalline glass-ceramic long-afterglow fluorescent material.Figure 16 has illustrated the emmission spectrum figure of this long-afterglow fluorescent material when stopping to excite back 10 minutes.As can be seen from this figure: this long-afterglow fluorescent material has 3 emission peaks at about 450nm, 485nm and 545nm place.Observe hyacinthine phosphorescence with the meat limit, and still can pick out phosphorescence in 24 hours excessively in the dark.
Measure the phosphorescence brightness of embodiment 32-44 and comparative example with method same as described above.Below table 7 illustrated embodiment 32-38 when stopping to excite back 10 minutes with respect to the relative phosphorescence brightness that is expressed as 100 comparative example.Below table 8 illustrated respectively embodiment 39-44 when stopping to excite back 5 minutes with respect to the phosphorescence brightness that is expressed as 100 comparative example 39-44.From table 7 with 8 as can be known: compare with prior art aluminate long afterglow fluorescent substance, contain SiO 2The steady persistence phosphorescence brightness of long-afterglow fluorescent material of the present invention improved significantly.
Table 7
The embodiment relative intensity
32 150
33 225
34 250
35 220
36 205
37 200
38 175
Comparative example 100
Table 8
The embodiment relative intensity
39 115
Comparative example 39 100
40 200
Comparative example 40 100
41 130
Comparative example 41 100
42 110
Comparative example 42 100
43 225
Comparative example 43 100
44 140
Comparative example 44 100
Fast light test
According to the test method (JIS standard) of the light fastness that can be used for luminous paint, the mercury-arc lamp of use 300W is carried out fast light test to the long-afterglow fluorescent material of embodiment 29-44.As a result, in the sample of any test, all do not observe the reduction of steady persistence phosphorescence brightness.

Claims (16)

  1. One kind to be activated and had chemical constitution by divalent europium be ROa (Al 1-xGa x) 2O 3B (Si 1-yGe y) 2O 3CEu 2+DM N+Long-afterglow fluorescent material, wherein R is selected from alkaline-earth metal and comprises that Ba, Sr, Ca and Mg and Zn's is at least a, M is selected from least a auxiliary activator of Nb, Zr, Bi, Mn, Sn, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and wherein a, b, c, d, x and y are below in the scope:
    0.3≤a≤8，
    0.001≤b≤2，
    0.001≤c≤0.3，
    0.001≤d≤0.3，
    0≤x＜1.0 and
    0≤y≤1.0。
  2. 2. long-afterglow fluorescent material as defined in claim 1, wherein R is Sr.
  3. 3. long-afterglow fluorescent material as defined in claim 1, wherein R is Ca.
  4. 4. long-afterglow fluorescent material as defined in claim 1, wherein M is Dy.
  5. 5. long-afterglow fluorescent material as defined in claim 1, wherein M is Nd.
  6. 6. long-afterglow fluorescent material as defined in claim 1, wherein a is in the scope of 0.3≤a≤6, and b is in the scope of 0.001≤b≤2.
  7. 7. long-afterglow fluorescent material as defined in claim 1, wherein a is in the scope of 0.5≤a≤3, and b is in the scope of 0.002≤b≤2.
  8. 8. long-afterglow fluorescent material as defined in claim 1, wherein c is in the scope of 0.001≤c≤0.2.
  9. 9. long-afterglow fluorescent material as defined in claim 1, wherein c is in the scope of 0.002≤c≤0.1.
  10. 10. long-afterglow fluorescent material as defined in claim 1, wherein d is in the scope of 0.001≤d≤0.2.
  11. 11. long-afterglow fluorescent material as defined in claim 1, wherein d is in the scope of 0.002≤d≤0.15.
  12. 12. long-afterglow fluorescent material as defined in claim 1, wherein x is 0≤x≤0.5.
  13. 13. long-afterglow fluorescent material as defined in claim 1, wherein x is 0≤x≤0.2.
  14. 14. long-afterglow fluorescent material as defined in claim 1, wherein y is 0≤y≤0.5.
  15. 15. long-afterglow fluorescent material as defined in claim 1, wherein y is 0≤y≤0.2.
  16. 16. one kind comprises the glass of long-afterglow fluorescent material-ceramic long-afterglow fluorescent material as defined in claim 1.
CNB021069999A 1997-05-09 1998-03-20 Long-afterglow fluorescent material Expired - Fee Related CN1236013C (en)

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